Mathf a contractor pays an average wage of $20.00 per hour and wants to make a 15% mark-up on the cost of labour, what will the contractor charge as an average labour cost on contracts?
March 23, 2015

mathIf m=n,then m−n = n−m = 0. Give a counterexample to show that the conditional is false
March 22, 2015

analytical toolsThe survival rate during a risky operation for patients with no other hope of survival is 74%. What is the probability that exactly four of the next five patients survive this operation? (Give your answer correct to three decimal places.)
March 22, 2015

Chemistry helpWhy it is important for there to be no further bubbling before the final mass of the reaction beaker is obtained?
March 22, 2015

ChemistryA sodium chloride solution has a density of 1.22 g/mL. How many moles of NaCl are dissolved in 10.0 mL of the solution? The density of water is 1.00 g/mL. My solution: ? mol NaCl = 10 mL*1.22 g/1mL*1mL/58.5g The correct answer is 3.76E-2 mol. Please help!
March 22, 2015

MathI had a table of values. X / Y -3/ 2.5 -2/ 5 -1/ 6.5 0 / 7 It asks without graphing. Does it open upward or downward. I got that in the quadratic equation. a= -0.5 And if a is smaller than 0. It opens downward However. The text book says it opens upward. So I'm confused
March 22, 2015

Business ManagementWe can help you on any Assignment . We are team of talented, dedicated professionals ready to help you get your Assignment done; we are nurturing powerful collaboration - from creative Writers, intuitive Market Researchers, Strategists, and great Web Developers. Our team can ...
March 22, 2015

Physics A motor boat is traveling at a speed of 2.4 m/s shuts off its engine at t=0. How far does it travel before coming to a rest if it is noted that after 3 seconds its speed has dropped to half of its original value? Assume that the drag force of the water is proportional to v. (R...
March 22, 2015

Physics a car goes over a circular hill of 50m radius at a constant speed of 20m/sec . What is the force of the car on the 600N driver at the top of the hill.?
March 22, 2015

ChemistryA sodium chloride solution has a density of 1.22 g/mL. How many moles of NaCl are dissolved in 10.0 mL of the solution? The density of water is 1.00 g/mL. My solution: ? mol NaCl = 10 mL*1.22 g/1mL*1mL/58.5g The correct answer is 3.76*10^2 mol. Please help!
March 22, 2015

MathHorses are measured in units called hands. One hand equals 1/3 foot. A horse is 5 1/3 feet tall. How tall is this horse in hands?
March 22, 2015

BiologyHow is that? I got 4 Ttyy, 4 TtYy, 4 TTYy, and 4 TTyy. Ttyy an TTyy are both tall+green, and TtYy and TTYy are both yellow.
March 22, 2015

BiologyWhat is the phenotype ratio for TTyy X TtYy? Is it 8:8 for tall + yellow to tall + green?
March 22, 2015

BiologyIn anaphase of mitosis, the sister chromatids are separated and pulled to the poles. How do these chromatids, which are only half of a duplicated chromosome, become chromosomes? As I understand it, mitosis produces daughter cells that are identical to the parent cells.
March 22, 2015

ChemistryCan someone please answer one of these question so I would be able to know how to do the others? 1. What volume of 0.275 M KOH (aq) must be added to 75.0 mL of 0.137 M H3AsO4 (aq) to reach (a) the first stoichiometric pony; (b) the second stoichiometric point 2. What volume of...
March 22, 2015

Intro statisticsA bag contains 7 red, 6 orange, and 9 green jellybeans. What is the probability of reaching into the bag and randomly withdrawing 11 jelly beans such that the number of red ones is 7 the number of orange ones is 1 and the number of green ones is 3?
March 21, 2015

PhysicsA motor boat is traveling at a speed of 2.4 m/s shuts off its engine at t=0. How far does it travel before coming to a rest if it is noted that after 3 seconds its speed has dropped to half of its original value? Assume that the drag force of the water is proportional to v. (R...
March 21, 2015

Physicsa 2.00 kg object has a velocity of 4.00i -3.00j m/s. What is the kinetic energy at this moment? What is the net work done on the object if its velocity change 6.00i +2.00j m/s
March 21, 2015

Physics a car goes over a circular hill of 50m radius at a constant speed of 20m/sec . What is the force of the car on the 600N driver at the top of the hill.?
March 21, 2015

chemistryyou by adding now have four significant figures. When adding, you keep all place values that were significant. if it had been 34 + 12.2+6.0=52. Cant do the tenths, as tenths was not significant in the first numeral.
March 21, 2015

English checkWhich quote believes that all of us have the ability to love? A. "Love is a binding force between two things that compels them to come together..." B. "Yet we do have the capacity to love not only other humans, but animals as well." C. "love would not ...
March 21, 2015

mathadult tickets are $17, student tickets are $9. how many adult and student tickets need to be sold to make a profit of $4,400?
March 21, 2015

Quick English check 'Cause I've had the time of my life And I owe it all to you I've been waiting for so long Now I've finally gound someone To stand by me We saw the writing on the wall As we felt this magical fantasy 4. Read stanza two... The tone of this stanza can be best ...
March 21, 2015

Quick English checkNow with passion in our eyes There's no way we could disguise it secretly So we take each other's hand Because we seem to understand the urgency In the third stanza, the word disguised means- A. Inportance B. Dress up as C. Hide D. Change appearance I chose C. 2. Which...
March 21, 2015

physicsthe mass of the sun is 2×10^30kg.the mass of a proton is 2×10^-27kg.if the sun was made only of protons.calculate the number of protons in the sun?
March 21, 2015

EnglishHello. I am having trouble writing an essay for this topic: What is the importance of taking advice and suggestions from others? I was wondering if someone could give me some tips and some inspiration on how to write this. I'am still stuck on the introductory paragraph. ...
March 20, 2015

MathA photo is 6 in wide and 3 in tall. If it is reduced to a height of 1 in, how wide will it be?
March 19, 2015

MathA photo is 6 in wide and 3 in tall. If it is reduced to a height of 1 in, then how wide will it be?
March 19, 2015

MathA ball is placed on a long inclined ramp. It rolls down the ramp as shown in the diagram. The equation d = 23 · t2 represents the distance in feet, d, the ball travels in t seconds. Part A How far does the ball travel in 5 seconds? Show your work. Part B How many ...
March 19, 2015

MathThe equation d = 23 · t2 represents the distance in feet, d, the ball travels in t seconds. Part A How far does the ball travel in 5 seconds?200 feet in 5 seconds. Show your work. Part B How many seconds would it take for the ball to travel 25 feet? Show your work. Part...
March 19, 2015

S.S". . . But now, after reiterated menaces, Mexico has passed the boundary of the United States, has invaded our territory and shed American blood upon the American soil. She has proclaimed that hostilities have commenced, and that the two nations are now at war. "As ...
March 19, 2015

S.SWhich question would best help you write a report regarding the changes to the political system during Jackson's presidency? A. How did Andrew Jackson react to the results of the election of 1824? B. When did Andrew Jackson decide to run for president? C. Did Andrew ...
March 19, 2015

Civics The Preamble includes the phrase "to form a more perfect union." Why is this reason listed for creating a new Constitution? Plans were made to expand to the Pacific Ocean. The British had provided economic support. The Articles of Confederation did not work. Some ...
March 19, 2015

food scienceA sample of grain in a bin is at 80.6 degrees F. The vapor pressure of water in the bin is 17.09 mm Hg. Assuming that the grain is well mixed, is the grain in danger of fungal growth and mycotoxin production?
March 19, 2015

mathYou want to make a graph to show how you spend your time each day. What would be the best graph for this data? A. Circle graph B. Line graph C. Histogram D. Stem_and leaf plot Is the answer A? Thank you
March 19, 2015

math help pleaseWhich of the following types of information is suited for display on a scatter plot? A. Relationship between favorite color and age. B. Relationship between number of pets and favorite TV show C. Relationship between hours of exercise and number of siblings. D. Relationship ...
March 19, 2015

Physics Three collinear charges +7.0 x10^-5 C , +4.8 x10*-5 C, and -8.0 x 10^-5 C exert forces on each other. The first and second charges are 35.0 cm apart. The second and third charges are 35.0 cm apart. What is the magnitude and charge of the total force on the third charge? I know...
March 19, 2015

Chemical EngineeringHigh-pressure helium is available from gas producers in 0.045-m^3 cylinders at 400 bar and 298 K. Calculate the explosion equivalent of a tank of compressed helium in terms of kilograms of TNT. Assume helium is an ideal gas
March 18, 2015

Chemical EngineeringHigh-pressure helium is available from gas producers in 0.045-m^3 cylinders at 400 bar and 298 K. Calculate the explosion equivalent of a tank of compressed helium in terms of kilograms of TNT. Assume helium is an ideal gas
March 18, 2015

mathsmy number is larger than 350. but smaller than 425. it has double the number of hundreds in the tens place. its ones number is 2 less than its tens number.
March 18, 2015

mathsmy number is less than half of a thousand. it is made up of odd numbers only. its tens number is half way between the hundreds number and the ones number in size.
March 18, 2015

Quick English check(21) Before they leave this festival, many visit the insect petting zoo. (22) Scientists believe some insects have been on Earth since prehistoric times. (23) Children line up for the opportunity to hold strange bugs of all kinds. (24) Most people agree that Purdue's Bug ...
March 18, 2015

Quick english check(14) National news agencies are always on hand. (15) They take pictures and interview the people who participate in this stage event. 1. How should sentences 14 and 15 be combined? A. National news agencies are always on hand because they interview the people who participate ...
March 18, 2015